LAWRENCE ENGINEERING SERVICE, Peru, Indiana / USA   (1943)
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S C A L E S   of  the    L A W R E N C E      Model »10-B«
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                                     ( one-sided only )
   A         X2
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   B         X2
   CI        1/X
   C         X
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   D         X
   K         X3

R E M A R K S :
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This common historic slide rule is made out of solid wood.
The surface is painted white with black printed scales. On
the back side are conversion tables and mathem. constants.
The slide rule came in a black cardboard box with a bow as
a birthday present.

Historical Remarks ...

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© C.HAMANN    www.tfh-berlin.de/~hamann   impressum  09/08/07